sys/dev/ata/ata_raid_adaptec.c

   1 /*      $NetBSD: ata_raid_adaptec.c,v 1.8 2008/03/18 20:46:36 cube Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * Support for parsing Adaptec ATA RAID controller configuration blocks.
  33  *
  34  * Adapted to NetBSD by Allen K. Briggs
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: ata_raid_adaptec.c,v 1.8 2008/03/18 20:46:36 cube Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/buf.h>
  42 #include <sys/bufq.h>
  43 #include <sys/conf.h>
  44 #include <sys/device.h>
  45 #include <sys/disk.h>
  46 #include <sys/disklabel.h>
  47 #include <sys/fcntl.h>
  48 #include <sys/malloc.h>
  49 #include <sys/vnode.h>
  50 #include <sys/kauth.h>
  51
  52 #include <miscfs/specfs/specdev.h>
  53
  54 #include <dev/ata/atareg.h>
  55 #include <dev/ata/atavar.h>
  56 #include <dev/ata/wdvar.h>
  57
  58 #include <dev/ata/ata_raidreg.h>
  59 #include <dev/ata/ata_raidvar.h>
  60
  61 #ifdef ATA_RAID_DEBUG
  62 #define DPRINTF(x)      printf x
  63 #else
  64 #define DPRINTF(x)      /* nothing */
  65 #endif
  66
  67 int
  68 ata_raid_read_config_adaptec(struct wd_softc *sc)
  69 {
  70         struct adaptec_raid_conf *info;
  71         struct atabus_softc *atabus;
  72         struct vnode *vp;
  73         int bmajor, error;
  74         dev_t dev;
  75         uint32_t gen, drive;
  76         struct ataraid_array_info *aai;
  77         struct ataraid_disk_info *adi;
  78
  79         info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
  80
  81         bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
  82
  83         /* Get a vnode for the raw partition of this disk. */
  84         dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
  85         error = bdevvp(dev, &vp);
  86         if (error)
  87                 goto out;
  88
  89         error = VOP_OPEN(vp, FREAD, NOCRED);
  90         if (error) {
  91                 vput(vp);
  92                 goto out;
  93         }
  94
  95         error = ata_raid_config_block_rw(vp, ADP_LBA(sc), info,
  96             sizeof(*info), B_READ);
  97         VOP_CLOSE(vp, FREAD, NOCRED);
  98         vput(vp);
  99         if (error) {
 100                 aprint_error_dev(sc->sc_dev,
 101                     "error %d reading Adaptec config block\n", error);
 102                 goto out;
 103         }
 104
 105         info->magic_0 = be32toh(info->magic_0);
 106         info->magic_1 = be32toh(info->magic_1);
 107         info->magic_2 = be32toh(info->magic_2);
 108         info->magic_3 = be32toh(info->magic_3);
 109         info->magic_4 = be32toh(info->magic_4);
 110         /* Check the signature. */
 111         if (info->magic_0 != ADP_MAGIC_0 || info->magic_3 != ADP_MAGIC_3) {
 112                 DPRINTF(("%s: Adaptec signature check failed\n",
 113                     device_xname(sc->sc_dev)));
 114                 error = ESRCH;
 115                 goto out;
 116         }
 117
 118         /*
 119          * Lookup or allocate a new array info structure for
 120          * this array.
 121          */
 122         aai = ata_raid_get_array_info(ATA_RAID_TYPE_ADAPTEC,
 123                 be32toh(info->configs[0].disk_number));
 124
 125         gen = be32toh(info->generation);
 126
 127         if (gen == 0 || gen > aai->aai_generation) {
 128                 aai->aai_generation = gen;
 129
 130                 aai->aai_status = AAI_S_READY;
 131
 132                 switch (info->configs[0].type) {
 133                 case ADP_T_RAID0:
 134                         aai->aai_level = AAI_L_RAID0;
 135                         aai->aai_interleave =
 136                             (be16toh(info->configs[0].stripe_sectors) >> 1);
 137                         aai->aai_width = be16toh(info->configs[0].total_disks);
 138                         break;
 139
 140                 case ADP_T_RAID1:
 141                         aai->aai_level = AAI_L_RAID1;
 142                         aai->aai_interleave = 0;
 143                         aai->aai_width = be16toh(info->configs[0].total_disks)
 144                             / 2;
 145                         break;
 146
 147                 default:
 148                         aprint_error_dev(sc->sc_dev,
 149                             "unknown Adaptec RAID type 0x%02x\n",
 150                             info->configs[0].type);
 151                         error = EINVAL;
 152                         goto out;
 153                 }
 154
 155                 aai->aai_type = ATA_RAID_TYPE_ADAPTEC;
 156                 aai->aai_ndisks = be16toh(info->configs[0].total_disks);
 157                 aai->aai_capacity = be32toh(info->configs[0].sectors);
 158                 aai->aai_heads = 255;
 159                 aai->aai_sectors = 63;
 160                 aai->aai_cylinders = aai->aai_capacity / (63 * 255);
 161                 aai->aai_offset = 0;
 162                 aai->aai_reserved = 17;
 163                 if (info->configs[0].name)
 164                         strlcpy(aai->aai_name, info->configs[0].name,
 165                             sizeof(aai->aai_name));
 166
 167                 /* XXX - bogus.  RAID1 shouldn't really have an interleave */
 168                 if (aai->aai_interleave == 0)
 169                         aai->aai_interleave = aai->aai_capacity;
 170         }
 171
 172         atabus = device_private(device_parent(sc->sc_dev));
 173         drive = atabus->sc_chan->ch_channel;
 174         if (drive >= aai->aai_ndisks) {
 175                 aprint_error_dev(sc->sc_dev,
 176                     "drive number %d doesn't make sense within %d-disk "
 177                     "array\n", drive, aai->aai_ndisks);
 178                 error = EINVAL;
 179                 goto out;
 180         }
 181
 182         adi = &aai->aai_disks[drive];
 183         adi->adi_dev = sc->sc_dev;
 184         adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
 185         adi->adi_sectors = aai->aai_capacity;
 186         adi->adi_compsize = be32toh(info->configs[drive+1].sectors);
 187
 188         error = 0;
 189
 190  out:
 191         free(info, M_DEVBUF);
 192         return (error);
 193 }